Wayfli › Seattle (SEA) › To Washington (IAD)
Seattle (SEA) to Washington (IAD) flights
There are direct flights from Seattle Tacoma International Airport to Washington Dulles International Airport, sold by one airline: United Airlines. The distance is 3,702 km, about 5h in the air. There are also 21 one-stop options, via airports such as Chicago, Dallas-Fort Worth and Atlanta.
Live fares for SEA → IADSee all routes on the map3,702 kmdistance
~5hdirect flight time (estimate)
1direct airline
21one-stop options
Direct flights from Seattle to Washington
| Route | Airlines (incl. codeshares) | Distance | Time (est.) |
|---|---|---|---|
| SEA → IAD | United Airlines | 3,702 km | ~5h |
Best one-stop connections
Through the biggest hubs first. Times include about 100 minutes to change planes.
| Via | Airlines | Distance | Time (est.) |
|---|---|---|---|
| ORD Chicago | American Airlines and Alaska Airlines then United Airlines | 3,707 km | ~7h 10m |
| DFW Dallas-Fort Worth | American Airlines and Alaska Airlines then American Airlines and United Airlines | 4,551 km | ~8h 15m |
| ATL Atlanta | Air France and Aeromexico then Air France and Aeromexico | 4,364 km | ~8h |
| JFK New York | American Airlines and Alaska Airlines then jetBlue and United Airlines | 4,253 km | ~7h 50m |
| EWR Newark | American Airlines and Alaska Airlines then United Airlines | 4,196 km | ~7h 45m |
| DEN Denver | American Airlines and Alaska Airlines then United Airlines and Southwest Airlines | 3,977 km | ~7h 30m |
| YYZ Toronto | Air Canada then Air Canada and United Airlines | 3,863 km | ~7h 25m |
| CLT Charlotte | American Airlines then American Airlines and United Airlines | 4,178 km | ~7h 45m |
| LAS Las Vegas | Alaska Airlines and Southwest Airlines then Frontier Airlines and United Airlines | 4,712 km | ~8h 25m |
| PHL Philadelphia | American Airlines and Alaska Airlines then United Airlines | 4,034 km | ~7h 35m |
| BOS Boston | American Airlines and Alaska Airlines then jetBlue and United Airlines | 4,669 km | ~8h 20m |
| MDW Chicago | Southwest Airlines then Southwest Airlines | 3,709 km | ~7h 10m |
More from Seattle and Washington
- Washington (IAD) to Seattle (SEA) · return route
- All direct flights from Seattle (SEA)
- All direct flights from Washington (IAD)
- Seattle to Istanbul (IST)
- Seattle to Amsterdam (AMS)
- Seattle to Paris (CDG)
- Seattle to Frankfurt (FRA)
- Seattle to Dubai (DXB)
- Seattle to Beijing (PEK)
- Seattle to Chicago (ORD)
- Seattle to Dallas-Fort Worth (DFW)
- Seattle to Shanghai (PVG)
- Seattle to London (LHR)
- Seattle to Atlanta (ATL)
- Seattle to Houston (IAH)
- Istanbul (IST) to Washington
- Amsterdam (AMS) to Washington
- Paris (CDG) to Washington
- Frankfurt (FRA) to Washington
- Dubai (DXB) to Washington
- Beijing (PEK) to Washington
- Chicago (ORD) to Washington
- Barcelona (BCN) to Washington
- Dallas-Fort Worth (DFW) to Washington
- Rome (FCO) to Washington
- Munich (MUC) to Washington
- London (LHR) to Washington
Routes come from current airline fares, updated weekly (last update 9 November 2026), plus older schedule data for airports with few recent fares. “Direct” can include a few same-plane flights with a stop. Flight times are estimates from distance. Always check with the airline before booking.